High‐Pressure‐Induced Pseudo‐oxidation of Copper Surfaces by Carbon Monoxide
Abstract
Abstract Instantaneous electronic and structural modifications of Cu surfaces by high‐pressure CO were explored. At pressures over a millibar range the coverage of CO on the Cu(1 1 1) surface reached approximately one monolayer, and we observed several shake‐up peaks in the Cu 2p photoemission spectra for the first time by using ambient pressure X‐ray photoelectron spectroscopy. These shake‐up peaks resembled those obtained for oxidized surface Cu atoms. We propose that these changes are related to the generation of a copper–carbonyl complex and subsequent Cu surface restructuring owing to lateral CO–CO repulsions. The generality of this finding was investigated in two model reactions, the water‐gas shift and CO oxidation, on a Cu(1 1 1) surface, and we clearly identified the pseudo‐oxidation of Cu. These reversible changes were found to be independent of the orientation of the Cu surface and are of general importance for Cu‐based heterogeneous catalysis.
- Authors:
-
- Radiation Laboratory and Department of Chemistry and Biochemistry University of Notre Dame Notre Dame IN 46556 USA
- Radiation Laboratory and Department of Physics University of Notre Dame Notre Dame IN 46556 USA
- Publication Date:
- Sponsoring Org.:
- USDOE
- OSTI Identifier:
- 1400553
- Grant/Contract Number:
- FC02-04ER15533
- Resource Type:
- Publisher's Accepted Manuscript
- Journal Name:
- ChemCatChem
- Additional Journal Information:
- Journal Name: ChemCatChem Journal Volume: 8 Journal Issue: 9; Journal ID: ISSN 1867-3880
- Publisher:
- Wiley Blackwell (John Wiley & Sons)
- Country of Publication:
- Germany
- Language:
- English
Citation Formats
Zhang, Xueqiang, and Ptasinska, Sylwia. High‐Pressure‐Induced Pseudo‐oxidation of Copper Surfaces by Carbon Monoxide. Germany: N. p., 2016.
Web. doi:10.1002/cctc.201600046.
Zhang, Xueqiang, & Ptasinska, Sylwia. High‐Pressure‐Induced Pseudo‐oxidation of Copper Surfaces by Carbon Monoxide. Germany. https://doi.org/10.1002/cctc.201600046
Zhang, Xueqiang, and Ptasinska, Sylwia. Sat .
"High‐Pressure‐Induced Pseudo‐oxidation of Copper Surfaces by Carbon Monoxide". Germany. https://doi.org/10.1002/cctc.201600046.
@article{osti_1400553,
title = {High‐Pressure‐Induced Pseudo‐oxidation of Copper Surfaces by Carbon Monoxide},
author = {Zhang, Xueqiang and Ptasinska, Sylwia},
abstractNote = {Abstract Instantaneous electronic and structural modifications of Cu surfaces by high‐pressure CO were explored. At pressures over a millibar range the coverage of CO on the Cu(1 1 1) surface reached approximately one monolayer, and we observed several shake‐up peaks in the Cu 2p photoemission spectra for the first time by using ambient pressure X‐ray photoelectron spectroscopy. These shake‐up peaks resembled those obtained for oxidized surface Cu atoms. We propose that these changes are related to the generation of a copper–carbonyl complex and subsequent Cu surface restructuring owing to lateral CO–CO repulsions. The generality of this finding was investigated in two model reactions, the water‐gas shift and CO oxidation, on a Cu(1 1 1) surface, and we clearly identified the pseudo‐oxidation of Cu. These reversible changes were found to be independent of the orientation of the Cu surface and are of general importance for Cu‐based heterogeneous catalysis.},
doi = {10.1002/cctc.201600046},
journal = {ChemCatChem},
number = 9,
volume = 8,
place = {Germany},
year = {Sat Apr 09 00:00:00 EDT 2016},
month = {Sat Apr 09 00:00:00 EDT 2016}
}
https://doi.org/10.1002/cctc.201600046
Web of Science
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